Description:Eric Kandel, who received the 2000 Nobel Prize in Physiology or Medicine, is professor of biochemistry and biophysics at the Columbia University College of Physicians and Surgeons and a senior investigator in the Howard Hughes Medical Institute. He was also the founding director of the Center for Neurobiology and Behavior, which is now the Department of Neuroscience at Columbia. Here he explains long term memory retention.(2:20)